Subject: Black Swallowtail caterpillar
Location: ohio
September 16, 2015 5:10 pm
I looked this one up, to see if it was a monarch, and am 99% sure this is a black swallowtail caterpillar eating my carrots. The carrots are almost ready to harvest, so they’re welcome to the leaves, but where will they chrysalis/metamorph? I don’t want to take away their environment. We have flowers nearby, xenias, etc. that all the butterflies have been going nuts over, will they go there?
Signature: Amber

Black Swallowtail Caterpillar

Black Swallowtail Caterpillar

Dear Amber,
The Black Swallowtail Caterpillar is sometimes called a Carrot Worm or a Parsley Worm.  It will likely try to find a protected location to metamorphose into a chrysalis as it will most likely pass the winter in the pupal form.

Location: Ohio

8 Responses to Black Swallowtail Caterpillar

  1. dennis Bjorn says:

    I live in central Minnesota and grow carrots every year.( I have lots of monarchs) I have never seen a Black Swallow tail butterfly or catrpillar before. My 6 year old daughter and I were looking at the carrots today when we spotted at least 8 Black Swallow tail caterpillars. Can the pupas survive our -20 degree temperatures?

  2. dennis Bjorn says:

    What do they look for when they are ready to pupate? I move monarch pupas all the time so we can watch them hatch in the house. I suppose I could do the same thing in my 30 degree garage.
    What is the normal pupation time for this swallow tail.

  3. dennis Bjorn says:

    I had a hard frost last night. Most of them have let go on the their head end. Will my 8 caterpillars survive this?

    • bugman says:

      Difficult to say. This is late in the year for Black Swallowtail Caterpillars in the northern portion of the range.

  4. dennis Bjorn says:

    They survived the frost! By Sunday temps will be near 80.
    I’m going to put sticks in the carrot patch to give them a place to hang on.Then I can move them to a sheltered location

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